CN112397968B - Cutting ring forming mechanism and commutator copper shell forming method - Google Patents

Abstract

The application discloses a ring-cutting mechanism, which relates to the field of commutator copper shell production. The first lower fixing block and the first upper fixing block arranged on the upper die; the first lower fixing block and the upper fixing block are both used to extrude the copper material strip and form a wave-shaped cavity with a depression in the middle and a convex on both sides; The pressing ring assembly includes a second lower fixing block arranged on the lower die, a second upper fixing block arranged on the upper die and a center rod arranged on the lower die; the second lower fixing block, the second upper fixing block and the central pole A ring-shaped die cavity is formed; the pushing component includes a first sliding rod for moving the copper material strip extruded by the preliminary extrusion component to the place where the ring component is extruded. The present application has the effect of reducing the number of integral mold parts and facilitating stable operation of the copper shell production mold.

Description

A kind of cutting ring mechanism and commutator copper shell forming method

technical field

The present application relates to the field of production of commutator copper shells, in particular to a cutting ring mechanism and a commutator copper shell forming method.

Background technique

During the production and processing of the copper shell of the commutator, a copper strip is driven by the driving source to move in the horizontal direction, and then through the pressing of the upper die and the lower die, the horizontal punching, edge trimming, chamfering, Cut and bend into loops.

Among them, cross punching: cut off the scrap of copper strip and form inner hook; trimming: cut off scrap of copper strip and form the hook part, the hook part is used for winding the wire of the commutator in the later stage; chamfering: cut off some edges and corners of the hook part, there are It is beneficial to protect the later wound wires and avoid disconnecting the wires; cutting: cutting the copper strip; bending into a ring: bending the cut copper strip gradually to form a ring-shaped copper shell.

However, in the process of bending into a ring, a plurality of upper dies and lower dies are usually used to gradually bend the copper strip. In order to ensure that the outer ring of the copper shell is closer to a circular shape, multiple bending processes are required, resulting in an increase in the number of parts of the entire mold and an increase in the instability of the overall mold during operation, which needs to be improved.

SUMMARY OF THE INVENTION

In order to reduce the number of molds in bending into a ring, the present application provides a mechanism for cutting into a ring, which has the effect of reducing the number of mold parts and facilitating stable operation of the copper shell production mold.

A kind of cutting ring mechanism provided by the application adopts the following technical scheme:

A cutting-ring mechanism includes a preliminary extruding assembly, an extruding ring assembly and a material pushing assembly; the preliminary extruding assembly includes a first lower fixing block arranged on a lower die and a first lower fixing block arranged on an upper die an upper fixing block; the first lower fixing block and the upper fixing block are both used to extrude the copper material strip and form a wave-shaped cavity with a depression in the middle and a convex on both sides;

The extruded ring assembly includes a second lower fixing block arranged on the lower die, a second upper fixing block arranged on the upper die, and a center rod arranged on the lower die; the second lower fixing block and the second upper fixing block and the central rod is formed with an annular mold cavity;

The pushing assembly includes a first sliding rod for moving the copper material strip extruded by the preliminary extruding assembly to the extruding ring assembly.

By adopting the above technical solution, when the upper die and the lower die are closed, the first upper fixing block and the first lower fixing block extrude the cut copper strip into a wave shape with convex sides and a depression in the middle. The material strip is an approximately M-shaped arc. The arc-shaped piece is pushed between the second lower fixing block and the second upper fixing block by the first sliding rod, and then through mold clamping, the arc-shaped piece forms a ring-shaped copper shell. Compared with the original method of bending the horizontal copper material strip with multiple groups of molds gradually into rings, the cutting and ring-forming mechanism of the present application has the effect of reducing the number of mold parts, which is convenient for the stable operation of the copper shell production mold, and also reduces the working steps. Improved work efficiency.

Optionally, one end of the first sliding rod used to push the copper strip is provided with a semi-arc pressing block; when the semi-arc pressing block pushes the copper strip, the semi-arc pressing block is located in the copper material. Above the middle depression of the belt.

By adopting the above technical solution, in the process of pushing the copper material strip (arc-shaped piece) by the first sliding rod, the semi-arc pressing block is located above the middle depression of the copper material belt, so that the copper material belt is more stable during the moving process. Stablize.

Optionally, the pusher assembly further includes a second sliding rod slidably arranged on the first lower fixing block, the second sliding rod is located on one side of the central rod and is used to push out the ring-shaped copper shell.

By adopting the above technical solution, after the upper mold and the lower mold are separated, the second sliding rod can slide the copper shell out of the mold.

Optionally, the lower end of the first upper fixing block is provided with a tip portion for cutting the copper material tape.

By adopting the above technical solution, when the upper mold and the lower mold are closed, the first upper fixing block moves toward the first lower fixing block. The belt is directly located between the first upper fixing block and the second upper fixing block for bending into arc-shaped parts, and the copper material strip can be cut and bent into arc-shaped parts with only one mold clamping, which has the advantages of improving production efficiency and reducing The effect of the mold part.

Optionally, the center rod is fixedly provided with a stabilizer rod that cooperates with the inner wall of the copper material strip to restrict the copper material strip from moving only along the axis of the center rod.

By adopting the above technical solution, the inner wall of the copper material strip is the inner wall of the copper shell formed by the copper material strip, and the inner wall of the copper material strip is preset with a groove, and the cooperation between the stabilizer bar and the groove restricts that the copper material strip can only move along the center rod. The movement of the axis line direction is beneficial to the quality of the copper shell forming in the subsequent extruding step to form a ring.

Optionally, an inner and lower sliding block is slidably connected to the second lower fixing block, and an inner elastic member for supporting the inner and lower sliding block is arranged on the second lower fixing block; the center rod is connected to the inner and lower sliding block. Removably connected and fixed, the center rod is slidably connected to the first lower fixing block.

By adopting the above technical solution, when the mold is closed, the second upper fixed block moves toward the second lower fixed block, the center rod and the inner lower sliding block move downward, and the inner elastic member is deformed by force; when the mold is split, the center The rod and the inner sliding block move up under the force of the inner elastic part, which is convenient for the later release of the copper shell.

Optionally, an outer and lower sliding block is slidably connected to the second lower fixing block, and an outer elastic member for supporting the outer and lower sliding blocks is arranged on the second lower fixing block; the outer and lower sliding blocks are far from the center rod. Support the part of the fixed block.

By adopting the above technical solution, when the mold is closed, the second upper fixed block moves toward the second lower fixed block, and the inner and lower sliding blocks and the outer lower sliding blocks provide supporting force to the lower ends of the center rod close to both ends, which is convenient for the center The force of the rod is uniform, which plays the role of protecting the center rod.

In order to reduce the number of molds in bending into a ring and improve the stability of the entire mold during operation, the present application also provides a ring-cutting mechanism, which has the effect of reducing parts and facilitating stable operation of the copper shell production mold.

A commutator copper shell forming method provided by the application adopts the following technical scheme:

A method for forming a copper shell of a commutator, comprising the following steps:

Preliminary extrusion step: After the upper die and the lower die are closed, a wave-shaped cavity with a depression in the middle and bulges on both sides will be formed, and the chamfered copper material strip will be extruded into an arc shape through the clamping of the upper die and the lower die. piece;

Steps of extruding into a ring: pressing the center rod against the middle depression of the arc-shaped piece, extruding the convex parts on both sides of the arc-shaped piece, and pressing the arc-shaped piece into a ring-shaped copper shell through the clamping of the upper die and the lower die.

By adopting the above technical solution, the chamfered copper material strip is first extruded into a wave-like shape with bulges on both sides and a depression in the middle through a preliminary extrusion step. At this time, the copper material strip is an approximately M-shaped arc piece , and then directly extrude into a ring-shaped copper shell through the step of extruding into a ring. In the above steps, the horizontal copper material strip can be extruded into a ring-shaped copper shell through two mold clamping, which has reduced parts and is convenient for copper Shell production molds run stably.

Optionally, it also includes:

Cutting step: the copper material strip is cut through the first upper fixing block, and the cut copper material strip is located between the upper die and the lower die that have not been closed at the preliminary extrusion step.

By adopting the above technical solution, the copper material strip can be cut and extruded into an arc-shaped piece in one mold clamping, which has the effect of reducing construction steps and components, and also improves production efficiency.

Optionally, it also includes:

Pushing step: push the arc-shaped part extruded through the preliminary extrusion step to between the upper die and the lower die at the extrusion ring step, and simultaneously demold the copper shell at the ring extrusion step.

By adopting the above technical scheme, the number of parts of the entire mold is reduced, the stability of the overall movement of the mold is improved, and the production efficiency is improved.

To sum up, the present application has the following beneficial effects:

1. The first upper fixing block moves to the first lower fixing block, and the cut copper strip is extruded into an arc-shaped piece with convex sides and a wavy depression in the middle. At the lower end of the depression, the second upper fixing block squeezes the convex parts on both sides of the arc-shaped member to realize the extrusion of the arc-shaped member into a ring and obtain a copper shell. This mechanism has a simple structure, and compared with the gradual bending method, this mechanism The number of parts of the overall mold is reduced, and the overall mold is more stable during operation;

2. During the movement of the first upper fixing block to the first lower fixing block, the copper strip is first cut at the tip, and then the cut copper strip is extruded into a wavy arc. The mold realizes the above functions, and has the effect of simple structure and reduction of mold parts.

Description of drawings

Fig. 1 is the partial schematic diagram of the cutting ring mechanism in the present application;

FIG. 2 is a schematic structural diagram of the preliminary extrusion assembly of the cutting ring mechanism in the present application when the copper material strip is extruded into an arc;

Fig. 3 is the partial structure exploded schematic diagram of the cutting into ring mechanism in this application;

4 is a schematic structural diagram of the first sliding rod pushing arc in the cutting-to-ring mechanism of the present application;

5 is a front view of the cutting ring mechanism in the present application when the mold is closed;

6 is a schematic diagram of the partial structure of the cutting-to-ring mechanism in the present application after the second upper fixing block is hidden;

7 is a schematic cross-sectional view of the partial structure of the cutting-ring mechanism in the present application, where the inner and lower sliding blocks and the inner elastic part are highlighted;

FIG. 8 is a schematic cross-sectional view of a partial structure where the outer lower sliding block and the outer elastic member are highlighted in the cutting-to-ring mechanism of the present application.

Reference numerals: 1. Preliminary extrusion assembly; 2. Extrusion into a ring assembly; 3. Push material assembly; 4. First lower fixing block; 5. First upper fixing block; 6. Wave-shaped cavity; 7. Tip part; 8. Arc-shaped piece; 9. First sliding rod; 10. Second sliding rod; 11. Semi-arc pressing block; 12. Second lower fixing block; 13. Second upper fixing block; 14 , center rod; 15, annular mold cavity; 16, vertical chute; 17, inner chute; 18, inner and lower sliding block; 19, inner elastic part; 20, outer chute; 21, outer and lower sliding block; 22. Outer elastic part; 23. Copper shell; 24. Stabilizer bar.

Detailed ways

The embodiment of the present application discloses a mechanism for cutting into rings. Referring to FIG. 1 , it includes a preliminary extrusion assembly 1 , an extrusion ring assembly 2 , and a pusher assembly 3 .

Referring to FIGS. 1 and 2 , the preliminary extrusion assembly 1 includes a first lower fixing block 4 relatively fixedly arranged on the lower die and a first upper fixing block 5 relatively fixedly arranged on the upper die. When the upper mold and the lower mold are closed, the first upper fixing block 5 moves toward the first lower fixing block 4 to form a wave-shaped cavity 6 with a concave middle and convex sides for placing the copper strip.

2 and 3, a tip portion 7 is integrally formed on the left side of the first upper fixing block 5, the lower end of the tip portion 7 is a tip, and the copper strip enters the first upper fixing block 5 from the left side in the mold Between the first lower fixing block 4 and the first lower fixing block 4, during the mold clamping process, the first upper fixing block 5 moves to the first lower fixing block 4, and the tip 7 first cuts the copper strip, and the cut copper strip directly Located between the first upper fixing block 5 and the first lower fixing block 4, the upper die and the lower die continue to mold and extrude the cut copper strip into a wavy arc with a depression in the middle and a convex on both sides. 8. The copper material strip can be cut and bent into an arc-shaped part 8 with only one mold clamping, which has the effect of improving the production efficiency and reducing the number of mold parts.

Referring to FIG. 3 , the pusher assembly 3 includes a first sliding rod 9 and two second sliding rods 10 . The first sliding rod 9 is arranged on the lower die and is slidably arranged relative to the first lower fixing block 4 . After the first upper fixing block 5 and the first lower fixing block 4 are clamped once, the first upper fixing block 5 and the first lower fixing block 4 are separated from each other, that is, the upper mold and the lower mold are separated, and the first sliding rod 9 The arc-shaped member 8 can be moved and pushed between the first upper fixing block 5 and the first lower fixing block 4 , so that the arc-shaped member 8 can be moved to the position of the extruded ring assembly 2 .

Referring to FIG. 4 , a half-arc pressing block 11 is integrally formed at one end of the first sliding rod 9 for pushing the copper strip (the arc-shaped member 8 ). When the first sliding rod 9 pushes the copper material strip (arc member 8 ), the semi-arc pressing block 11 is located above the middle depression of the copper material strip, so that the copper material strip is more stable during the moving process.

Referring to FIG. 5 , the extrusion ring assembly 2 includes a second lower fixing block 12 fixedly arranged on the lower die, a second upper fixing block 13 fixedly arranged on the upper die, and a center rod 14 . The opposite sides of the second lower fixing block 12 and the second upper fixing block 13 are both provided with semi-circular arc grooves. After the mold is closed, the second lower fixing block 12 , the second upper fixing block 13 and the center rod 14 are formed with an annular mold cavity 15 .

2 and 6 , the first lower fixing block 4 is provided with a vertical chute 16 into which the end of the center rod 14 is inserted, and one end of the center rod 14 is inserted into the vertical chute 16 of the first lower fixing block 4 Inside, the arrangement of the vertical chute 16 restricts the central rod 14 to move only in the vertical direction.

Referring to FIGS. 6 and 7 , the second lower fixing block 12 is provided with an inner chute 17 , an inner lower sliding block 18 is slidably arranged in the inner chute 17 , and the second lower fixing block 12 is also provided with an inner chute 17 . The inner elastic member 19 inside. The inner and lower sliding blocks 18 and the central rod 14 are detachably connected and fixed by means of screws. The inner elastic member 19 is selected as a spring, and the inner elastic member 19 supports the inner lower sliding block 18 so as to realize the support for the central rod 14 . During mold clamping, the second upper fixing block 13 moves toward the second lower fixing block 12, the center rod 14 and the inner lower sliding block 18 move downward, and the inner elastic member 19 is deformed by force; 14 and the inner sliding block move upward under the force of the inner elastic member 19, which facilitates the demoulding of the copper shell 23 in the later stage.

Referring to FIGS. 6 and 8 , the second lower fixing block 12 is also provided with an outer chute 20 , an outer lower sliding block 21 is slidably arranged in the outer chute 20 , and the second lower fixing block 12 is also provided with an outer chute located in the outer chute 20 . Outer elastic member 22 inside 20. The inner elastic member 19 is selected as a spring, the outer elastic member 22 supports the outer lower sliding block 21, and the outer lower sliding block 21 is located at the lower end of the part of the central rod 14 away from the first lower fixing block 4, so as to realize the alignment of the central rod 14 away from the first lower fixed block 4. The part of the lower fixing block 4 is supported. The arrangement of the outer and lower sliding blocks 21 facilitates the uniform force on the center rod 14 and protects the center rod 14 .

Referring to FIG. 3 , the two second sliding rods 10 are both slidably arranged on the first lower fixing block 4 and are located on both sides of the center rod 14 , when the second lower fixing block 12 and the second upper fixing block 13 are pressed against each other , the arc-shaped member 8 is extruded into a ring-shaped copper shell 23. When the second lower fixing block 12 and the second upper fixing block 13 are separated from each other, the central rod 14 moves up and resets under the force of the inner elastic member 19 By driving the two second sliding rods 10, one end of the second sliding rods 10 pushes the side wall of the copper shell 23 and pushes the copper shell 23 out of the center rod 14, so as to realize the demoulding of the copper shell 23.

It should be mentioned that the first sliding rod 9 and the two second sliding rods 10 can move synchronously by connecting the same driving member. For example, using a cylinder, the first sliding rod 9 and the two second sliding rods 10 are relatively fixedly connected to the piston rod of the cylinder. After the mold is split, the cylinder can work to push the arc-shaped member 8 to the second upper fixing block. 13 and the second lower fixing block 12, the copper shell 23 is demolded at the same time.

Referring to FIGS. 3 and 5 , the center rod 14 is fixedly provided with a stabilizer rod 24 extending in the direction of the axis of the center rod 14 . A groove is preset on the inner wall of the copper strip, and the inner wall of the copper strip is the inner wall of the copper shell 23 formed by the copper strip. The axial movement of the rod 14 has the effect of stabilizing the arc-shaped member 8, and is also beneficial to the quality of the copper shell 23 formed in the subsequent step of extruding into a ring.

The specific working conditions are as follows:

The copper material tape enters between the first upper fixing block 5 and the first lower fixing block 4 . The first upper fixing block 5 moves toward the first lower fixing block 4 and extrudes (clamping), the first upper fixing block 5 cuts the copper material strip and extrudes the copper material strip into an arc-shaped piece 8 . The first upper fixing block 5 and the first lower fixing block 4 are separated from each other (dividing). The first sliding rod 9 pushes the arc-shaped member 8 and moves the arc-shaped member 8 to the center rod 14 between the second upper fixing block 13 and the second lower fixing block 12 . The second upper fixing block 13 moves toward the second lower fixing block 12 and squeezes (clamping), the second upper fixing block 13 , the second lower fixing block 12 and the center rod 14 cooperate to extrude the arc-shaped member 8 into a Ring-shaped copper shell 23 . The second upper fixing block 13 and the second lower fixing block 12 are separated (molded). The second sliding rod 10 pushes the copper shell 23 and realizes demoulding.

It should be mentioned that the cutting and ring-forming mechanism of the present application can be used for the continuous manufacture of copper shell 23 products. In one mold clamping, the copper material strip can be extruded into an arc-shaped part 8 and another arc-shaped part 8 can be extruded at the same time. A ring-shaped copper shell 23 is extruded.

Compared with the previous method in which multiple sets of dies gradually bend the horizontal copper material strip into rings, the cutting and ring-forming mechanism of the present application has the effect of reducing the number of die parts, facilitating the stable operation of the production die for the copper shell 23, and reducing the number of working steps. Improved work efficiency.

The present application also discloses a method for forming a copper shell of a commutator, which includes the following steps:

Cross punching step: cut off copper tape waste and form inner hook;

Trimming step: cut off the scrap copper tape and form a hook, which is used for winding the wire of the commutator in the later stage;

Chamfering step: Cut off some edges and corners of the hook, which is beneficial to protect the wire wound later and avoid cutting the wire;

Cutting step: Cut the copper strip.

Preliminary extrusion step: After the upper die and the lower die are closed, a wave-shaped cavity 6 with a depression in the middle and bulges on both sides will be formed, and the chamfered and cut copper strip will be extruded through the clamping of the upper die and the lower die. Arc-shaped piece 8.

The step of extruding into a ring: the center rod 14 abuts the lower part of the middle depression of the arc-shaped member 8, squeezes the convex parts on both sides of the arc-shaped member 8 and makes the two convex parts rotate and surround the center rod 14, The clamping of the mold and the lower mold presses the arc-shaped member 8 into a ring-shaped copper shell 23 .

Pushing step: push the arc-shaped piece 8 extruded through the preliminary extrusion step to between the upper die and the lower die at the extrusion ring step, and simultaneously remove the copper shell 23 at the extrusion ring step. mold.

Wherein, in the cutting step, the first upper fixing block 5 is used to cut the copper material tape, and the cut copper material tape is located between the first upper fixing block 5 and the first lower fixing block 4 in the preliminary extrusion step, and is cut. The copper strips are extruded into arc-shaped parts 8. The copper material strip can be cut and extruded into an arc-shaped part 8 in one mold clamping, which has the effect of reducing construction steps and components, and also improves production efficiency.

The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore: all equivalent changes made according to the structure, shape and principle of the present application should be included in the protection scope of the present application. Inside.

Claims (6)

1. A mechanism for cutting into a ring, characterized in that: it includes a preliminary extrusion assembly (1), an extrusion into a ring assembly (2) and a pusher assembly (3); the preliminary extrusion assembly (1) includes a A first lower fixing block (4) provided on the lower die and a first upper fixing block (5) provided on the upper die; the first lower fixing block (4) and the first upper fixing block are both used for pressing The copper-pressed material strip is formed with a wave-shaped cavity (6) with a depression in the middle and bulges on both sides; The extrusion ring assembly (2) includes a second lower fixing block (12) arranged on the lower die, a second upper fixing block (13) arranged on the upper die, and a central rod (14) arranged on the lower die ; The second lower fixing block (12), the second upper fixing block (13) and the central rod (14) are formed with an annular mold cavity (15); The pushing assembly (3) includes a first sliding rod (9) for moving the copper material strip extruded by the preliminary extruding assembly (1) to the extruding ring assembly (2); the first sliding rod (9); An inner lower sliding block (18) is slidably connected to the second lower fixing block (12), and an inner elastic member (19) for supporting the inner lower sliding block (18) is provided on the second lower fixing block (12); the center The rod (14) is detachably connected and fixed to the inner and lower sliding blocks (18), and the central rod (14) is slidably connected to the first lower fixing block (4). 2. The mechanism for cutting into rings according to claim 1, characterized in that: one end of the first sliding rod (9) for pushing the copper material strip is provided with a semi-arc pressing block (11); When the semi-arc pressing block (11) pushes the copper material strip, the semi-arc pressing block (11) is located above the middle depression of the copper material strip. 3. The ring-cutting mechanism according to claim 1, wherein the pusher assembly (3) further comprises a second sliding rod (10) slidably arranged on the first lower fixing block (4), The second sliding rod (10) is located on one side of the central rod (14) and is used to push out the ring-shaped copper shell (23). 4. The mechanism for cutting into rings according to claim 1, wherein the lower end of the first upper fixing block (5) is provided with a tip portion (7) for cutting the copper material strip. 5. The ring-cutting mechanism according to claim 1, characterized in that: the center rod (14) is fixedly provided with an inner wall of the copper material strip to limit the copper material strip only along the axis of the center rod (14). The stabilizer bar (24) moves in the direction of the line. 6. The ring-cutting mechanism according to claim 1, wherein the second lower fixing block (12) is slidably connected with an outer lower sliding block (21), and the second lower fixing block (12) is provided with an outer lower sliding block (21). There is an outer elastic member (22) for supporting the outer and lower sliding blocks (21); the outer and lower sliding blocks (21) support the part of the central rod (14) away from the first lower fixing block (4).

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